A prefabricated component based on phosphogypsum and domestic sludge and a method for producing the same

Abstract

The application discloses a prefabricated component based on phosphogypsum and domestic sludge and a preparation method thereof, which comprises an outer layer and a center reinforcing core arranged in the outer layer, and a plurality of groups of through holes are arranged in the center reinforcing core from top to bottom; wherein the center reinforcing core comprises an inner lining plate with a positioning groove arranged on one side, and a convex part one and a convex part two integrally arranged on both sides of the inner lining plate; the convex part one and the convex part two and the outer wall part connected with the inner lining plate cooperatively form a Z-shaped structure. The prefabricated component of the application is wrapped with the center reinforcing core in the outer layer, and the outer layer and the center reinforcing core both contain phosphogypsum powder and domestic sludge, the center reinforcing core containing polyurethane elastomer powder and bamboo powder has certain elasticity and toughness, so that the prefabricated component prepared by wrapping the center reinforcing core with the outer layer has high compressive strength and splitting tensile strength, and the service life and the use range of the prepared prefabricated component are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phosphogypsum and domestic sludge treatment, in particular to a prefabricated component based on phosphogypsum and domestic sludge and a preparation method thereof. BACKGROUND

[0002] Phosphogypsum is an industrial by-product of wet-process phosphoric acid production in phosphorus chemical enterprises, and the main component of phosphogypsum is calcium sulfate dihydrate, which is powdery, and generally appears in colors such as grayish white, grayish yellow, and light green, and also contains organic phosphorus, sulfur and fluorine compounds; domestic sludge is a long-term, stable and large amount of sludge produced with the growth of urban sewage treatment capacity. The large amount of stacking of phosphogypsum and domestic sludge not only occupies a large amount of land resources, but also pollutes the environment, so at the present stage, it is urgent to change phosphogypsum and domestic sludge into treasure. At present, the prefabricated component prepared by phosphogypsum and domestic sludge can be used.

[0003] However, the overall compressive and splitting performance of the prefabricated component prepared by phosphogypsum and domestic sludge is poor, which leads to short service life of the prepared prefabricated component, low application range, and cannot achieve maximum resource utilization. Therefore, we propose a prefabricated component based on phosphogypsum and domestic sludge and a preparation method thereof. SUMMARY

[0004] The purpose of the present application is to provide a prefabricated component based on phosphogypsum and domestic sludge and a preparation method thereof to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A prefabricated component based on phosphogypsum and domestic sludge, comprising:

[0007] an outer layer;

[0008] a central reinforcing core arranged in the outer layer, the central reinforcing core being provided with a plurality of through holes vertically and horizontally;

[0009] The central reinforcing core comprises an inner lining plate provided with a positioning groove on one side, and a first convex portion and a second convex portion integrally inclined on both sides of the inner lining plate, and the first convex portion and the second convex portion and the outer wall part connected with the inner lining plate form a Z-shaped structure.

[0010] Further improvement is that the included angle between the first convex portion and the second convex portion and the inner lining plate is in the range of 30-60°.

[0011] Further improvement lies in that the raw material of the outer layer comprises, in percentage by weight, 35-50% of phosphogypsum powder, 25-35% of domestic sludge, 5-15% of cement, 2-6% of polyester fiber, 8-14% of wood powder, 3-5% of multifunctional additive and 3-5% of water;

[0012] The raw material of the central reinforcing core comprises, in percentage by weight, 30-40% of phosphogypsum powder, 20-30% of domestic sludge, 10-16% of cement, 8-12% of wood powder, 8-10% of polyurethane elastomer powder, 8-10% of bamboo powder and 1-3% of water;

[0013] The multifunctional additive is one or more of water reducing agent, air entraining agent, binder, water retaining agent, early strength agent, waterproof agent and thixotropic lubricant.

[0014] Further improvement lies in that the mesh number of the phosphogypsum powder is -mesh, the mesh number of the wood powder is -mesh, the mesh number of the polyurethane elastomer powder is -mesh and the mesh number of the bamboo powder is -mesh.

[0015] A preparation method of a prefabricated component, specifically comprising the following steps:

[0016] S1: weighing the components of the central reinforcing core in proportion, and obtaining the central reinforcing core slurry after mixing;

[0017] S2: injecting the central reinforcing core slurry into a preparation mold preheated to 60℃, and curing at 80℃ for 1-2h to obtain the central reinforcing core;

[0018] S3: weighing the components of the outer layer 1 in proportion, and obtaining the outer layer slurry after mixing;

[0019] S4: injecting the outer layer 1 slurry into the preparation mold in S2, and wrapping the central reinforcing core in the preparation mold with the outer layer slurry, then curing the whole at 90℃ for 1-2h to obtain the prefabricated component, and then taking out the prefabricated component from the preparation mold.

[0020] Further improvement lies in that the preparation mold in the step S comprises a fixed mold base provided on a support frame and having a forming through opening vertically and longitudinally, a mold plate assembly provided in the forming through opening, and a groove forming assembly provided on one side of the fixed mold base for forming positioning grooves.

[0021] The template assembly includes an upper die seat and a lower die seat respectively arranged at two ends of the forming through opening, the upper die seat and the lower die seat are respectively provided with a convex part forming groove one and a convex part forming groove two for forming a convex part one and a convex part two on the opposite side outer walls, a plurality of hole body forming columns for forming through holes are arranged in the upper die seat and the lower die seat in one-to-one correspondence, the upper die seat and the lower die seat are both provided with horizontal die seats on the opposite sides, the horizontal die seats are connected with the driving assembly arranged on the support frame, and the horizontal die seats are driven to ascend and rotate relative to the fixed die seat by the driving assembly, and the upper die seat and the upper horizontal die seat are provided with a feeding pipe penetrating therefrom.

[0022] Further improvement lies in that the driving assembly includes two groups of linear driving modules respectively arranged on the two sides of the support frame and two groups of sliding seats respectively slidingly arranged above and below the linear driving modules, the two upper sliding seats are connected with the upper horizontal die seat through a rotating shaft, the two lower sliding seats are connected with the lower horizontal die seat through a rotating shaft, and the sliding seat is provided with a rotating device for driving the rotating shaft to drive the horizontal die seat to rotate.

[0023] The linear driving module is used for driving the upper and lower sliding seats to move close to or away from each other.

[0024] Further improvement lies in that the groove forming assembly includes a telescopic device arranged on one side of the fixed die seat, an output end of the telescopic device extends into the forming through opening through a movable opening formed in the inner wall of the forming through opening and is connected with a positioning block for forming a positioning groove, the positioning block is matched with the movable opening, and the positioning block is located on a transverse horizontal line in the center of the forming through opening.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] The prefabricated component has a center reinforcing core wrapped in the outer layer, the outer layer and the center reinforcing core both have phosphogypsum powder and domestic sludge, resources are fully utilized, the center reinforcing core containing polyurethane elastomer powder and bamboo powder has certain elasticity and toughness, the prefabricated component prepared by wrapping the center reinforcing core with the outer layer has high compressive and splitting strength, the service life and use range of the prepared prefabricated component are improved, and resource utilization maximization is effectively achieved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a sectional view of the prefabricated component structure of the present application;

[0028] Figure 2 It is a preparation mold structure schematic diagram of the present application;

[0029] In the figure: 1, outer layer; 2, inner lining plate; 3, convex part one; 4, convex part two; 5, through hole; 6, positioning groove; 7, fixed mold base; 8, forming through port; 9, upper mold base; 10, lower mold base; 11, convex part forming groove one; 12, convex part forming groove two; 13, feeding pipe; 14, hole body forming column; 15, horizontal mold base; 16, positioning block; 17, telescopic device; 18, sliding seat; 19, rotating device; 20, linear drive module; 21, support frame. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Embodiment 1

[0032] Please refer to the accompanying Figure 1 A prefabricated component based on phosphogypsum and domestic sludge, comprising:

[0033] The outer layer 1;

[0034] The central reinforcing core is arranged in the outer layer 1, and a plurality of groups of through holes 5 are formed through the central reinforcing core from top to bottom;

[0035] The central reinforcing core comprises an inner lining plate 2 provided with a positioning groove 6 on one side, and a convex part one 3 and a convex part two 4 integrally arranged on both sides of the inner lining plate 2, and the convex part one 3 and the convex part two 4 and the outer wall part connected with the inner lining plate 2 cooperatively form a Z-shaped structure.

[0036] The central reinforcing core improves the impact resistance, shock buffering performance of the prefabricated component, and improves the toughness and strength of the prefabricated component as a whole.

[0037] The included angle between the convex part one 3 and the convex part two 4 and the inner lining plate 2 is in the range of 30-60°.

[0038] The preparation raw materials of the outer layer 1 include, in terms of percentage by weight: 40% of phosphogypsum powder, 30% of domestic sludge, 10% of cement, 4% of polyester fiber, 10% of wood powder, 3% of binder, and 3% of water.

[0039] The preparation raw materials of the central reinforcing core include, in terms of percentage by weight: 33% of phosphogypsum powder, 25% of domestic sludge, 13% of cement, 9% of wood powder, 9% of polyurethane elastomer powder, 9% of bamboo powder, and 2% of water.

[0040] It should be noted that the above-mentioned phosphogypsum powder is ordinary phosphogypsum powder; domestic sludge is, for example, sludge accumulated at the upstream water inlet of Huangpi Lake in Lujiang County; cement is Portland cement; wood powder is wood-plastic wood powder; adhesive is phenolic resin adhesive; polyurethane elastomer powder is obtained by crushing, grinding and screening thermoplastic polyurethane elastomer; and bamboo powder is obtained by crushing, grinding and screening bamboo.

[0041] The mesh number of the phosphogypsum powder is 300 meshes, the mesh number of the wood powder is 80 meshes, the mesh number of the polyurethane elastomer powder is 60 meshes, and the mesh number of the bamboo powder is 80 meshes.

[0042] According to the preparation method of the prefabricated component, the following steps are specifically included:

[0043] S1: The components of the central reinforcing core are weighed according to the proportion, and the central reinforcing core slurry is obtained after stirring and mixing;

[0044] S2: The central reinforcing core slurry is injected into a preparation mold preheated to 60 DEG C, and the central reinforcing core is obtained after being cured at 80 DEG C for 1.5 h;

[0045] S3: The components of the outer layer 1 are weighed according to the proportion, and the outer layer slurry is obtained after stirring and mixing;

[0046] S4: The outer layer 1 slurry is injected into the preparation mold in S2, and the outer layer slurry wraps the central reinforcing core in the preparation mold, and then the whole is cured at 90 DEG C for 1.5 h to obtain a prefabricated component, and then the prefabricated component is taken out from the preparation mold.

[0047] Please refer to the accompanying drawings Figure 2 As preferred, the preparation mold in step S2 of the embodiment includes a fixed mold base 7 provided on the support frame 21 and having a forming through opening 8 penetrating up and down, a mold plate assembly provided in the forming through opening 8, and a groove forming assembly provided on one side of the fixed mold base 7 for forming a positioning groove 6;

[0048] The mold plate assembly includes an upper mold base 9 and a lower mold base 10 provided respectively at two ends in the forming through opening 8, and the upper mold base 9 and the lower mold base 10 are respectively provided with a convex part forming groove one 11 and a convex part forming groove two 12 for forming a convex part one 3 and a convex part two 4 on the opposite side outer wall, and it should be noted that, as shown in the accompanying drawings Figure 2 It can be seen that the upper mold base 9 and the lower mold base 10 are adapted to the forming through opening 9, and they can enter the forming through opening 9 so that the thickness of the formed central reinforcing core meets the needs;

[0049] A plurality of hole body forming columns 14 for forming through holes 5 are provided in the upper mold base 9 and the lower mold base 10 in one-to-one correspondence, and the through holes 5 are left in the formed central reinforcing core through the through holes 5 so that the outer layer slurry can wrap the central reinforcing core later;

[0050] The upper die seat 9 and the lower die seat 10 are provided with horizontal die seats 15 on the opposite sides, the horizontal die seats 15 are connected with the driving assembly provided on the support frame 21, and are driven by the driving assembly to ascend and rotate relative to the fixed die seat 7, the length of the horizontal die seat 15 is greater than the length of the forming opening 8, the horizontal die seat 15 is matched with the forming opening 8 when the outer layer 1 is prepared, so that the surface of the formed outer layer 1 is smooth and flat, the feeding pipe 13 is provided on the upper die seat 9 and the upper horizontal die seat 15 in a penetrating mode, and is used for injecting slurry;

[0051] It should be noted that the center reinforcing core of the application has a certain elasticity after being formed, so that the convex part one 3 and the convex part 4 in the formed center reinforcing core will be deformed when the driving assembly drives the horizontal die seat 15 to move the upper die seat 9 and the lower die seat 10 away from the fixed die seat 7, and the problem of being unable to be separated will not occur, further, the upper die seat 9 and the lower die seat 10 of the application can also be made of high-temperature-resistant elastic materials, such as butyl rubber materials, and the problem of being unable to be separated from the convex part one 3 and the convex part 4 in the formed center reinforcing core when the upper die seat 9 and the lower die seat 10 move can also be effectively avoided.

[0052] As preferred, the driving assembly of the embodiment includes two groups of linear driving modules 20 respectively provided on the two sides of the support frame 21 and two groups of sliding seats 18 respectively slidingly provided above and below the linear driving modules 20, the two upper sliding seats 18 are connected with the upper horizontal die seat 15 through a rotating shaft, the two lower sliding seats 18 are connected with the lower horizontal die seat 15 through a rotating shaft, and the sliding seat 18 is provided with a rotating device 19 for driving the rotating shaft to drive the horizontal die seat 15 to rotate;

[0053] The linear driving module 20 is used for driving the upper and lower sliding seats 18 to move close to or away from each other, for example, the linear driving module 20 is composed of a guide rail, a servo motor and a bidirectional screw rod, and the rotating device 19 is composed of a servo motor and a gear set (two gears meshing with each other) connected with the output end of the servo motor and a rotating shaft.

[0054] As preferred, the groove forming assembly of the embodiment includes a telescopic device 17 provided on one side of the fixed die seat 7, the output end of the telescopic device 17 extends into the forming opening 8 through a movable opening formed in the inner wall of the forming opening 8 and is connected with a positioning block 16 for forming the positioning groove 6, the positioning block 16 is matched with the movable opening, and the positioning block 16 is on the transverse horizontal line at the center of the forming opening 8.

[0055] The specific working process of the preparation device of the application is as follows:

[0056] In use, by injecting the central reinforcing core slurry into the feeding pipe 13, the central reinforcing core slurry enters the space surrounded by the outer wall of the opposite side of the upper die holder 9 and the lower die holder 10, the inner wall of the forming opening 8, and the outer wall of the positioning block 16, and a central reinforcing core with a through hole 5 and a positioning groove 6 is formed. Then, the linear drive module 20 drives the upper and lower horizontal die holders 15 to move away from each other, driving the upper die holder 9 and the lower die holder 10 to separate from the formed central reinforcing core. After the horizontal die holder 15 moves to the designated position, the rotating device 19 drives the horizontal die holder 15 to rotate 180 degrees, so that the horizontal die holder 15 corresponds to the forming opening 8. Then, the linear drive module 20 drives the horizontal die holder 15 to reset and contact the fixed die holder 7. Then, by injecting the outer layer slurry into the feeding pipe 13, the outer layer slurry passes through the central reinforcing core through the through hole 5, and fills the space surrounded by the outer wall of the opposite side of the upper and lower horizontal die holders 15, the inner wall of the forming opening 8, and the outer wall of the central reinforcing core, and a prefabricated component is formed. Then, the telescopic device 17 drives the positioning block 16 to enter the movable opening, and the linear drive module 20 drives the upper and lower horizontal die holders 15 to move away from each other. At this time, the prefabricated component in the forming opening 8 can be taken out.

[0057] Comparative Example 1

[0058] The difference from Example 1 is that the outer layer 1 is a solid structure without a central reinforcing core inside.

[0059] Comparative Example 2

[0060] The difference from Example 1 is that the central reinforcing core does not include the convex part one 3 and the convex part two 4.

[0061] Comparative Example 3

[0062] The difference from Example 1 is that the preparation raw material of the central reinforcing core does not include polyurethane elastomer powder and bamboo powder.

[0063] Performance test:

[0064] According to the method of Example 1 and Comparative Examples 1-3, prefabricated components were prepared and the following performance tests were conducted:

[0065] The prefabricated components prepared according to Example 1 and Comparative Examples 1-3 were tested for compressive strength and splitting tensile strength by a fatigue testing machine.

[0066]

[0067] Conclusion: According to the experimental results, it can be known that the prefabricated component prepared in Example 1 has higher compressive strength and splitting strength, and in addition, according to Comparative Examples 1-3, it can be known that the central reinforcing core with the convex part one 3 and the convex part two 4 according to Example 1 can improve the overall compressive, splitting and other properties of the prefabricated component, and in addition, the polyurethane elastomer powder and bamboo powder in the central reinforcing core make the central reinforcing core have higher toughness and elastic properties, further strengthening the compressive, splitting and other properties of the prefabricated component after preparation.

[0068] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are only by way of example and that modifications, changes, substitutions and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A prefabricated component based on phosphogypsum and sewage sludge, characterized in that, include: Outer layer (1); A central reinforcing core is located inside the outer layer (1), and multiple sets of through holes (5) are opened through the central reinforcing core from top to bottom; The central reinforcing core includes an inner liner plate (2) with a positioning groove (6) on one side, and an integrally inclined protrusion one (3) and protrusion two (4) respectively provided on both sides of the inner liner plate (2). The protrusion one (3) and protrusion two (4) and their outer wall portions connected to the inner liner plate (2) cooperate to form a Z-shaped structure. The raw materials for preparing the outer layer (1) include, by weight percentage: 35-50% phosphogypsum powder, 25-35% domestic sewage sludge, 5-15% cement, 2-6% polyester fiber, 8-14% wood flour, 3-5% multifunctional additives, and 3-5% water; The raw materials for preparing the central reinforcing core include, by weight percentage: 30-40% phosphogypsum powder, 20-30% domestic sewage sludge, 10-16% cement, 8-12% wood flour, 8-10% polyurethane elastomer powder, 8-10% bamboo powder, and 1-3% water; The multifunctional additive is one or more of the following: water-reducing agent, air-entraining agent, binder, water-retaining agent, early-strength agent, waterproofing agent, and thixotropic lubricant.

2. The prefabricated component according to claim 1, characterized in that: The included angle between the first protrusion (3) and the second protrusion (4) and the inner lining plate (2) is in the range of 30-60°.

3. The prefabricated component according to claim 1, characterized in that: The phosphogypsum powder has a mesh size of 300-700, the wood powder has a mesh size of 80-120, the polyurethane elastomer powder has a mesh size of 60-80, and the bamboo powder has a mesh size of 80-120.

4. The method for preparing prefabricated components according to any one of claims 1-3 specifically includes the following steps: S1: Weigh each component of the central reinforcing core according to the proportion, and mix them to obtain the central reinforcing core slurry; S2: Inject the central reinforcing core slurry into a preheated mold at 60°C and cure it at 80°C for 1-2 hours to obtain the central reinforcing core; S3: Weigh out each component of the outer layer (1) according to the proportion, and mix them by stirring to obtain the outer layer slurry; S4: Inject the outer layer (1) slurry into the preparation mold in S2. The outer layer slurry wraps the central reinforcing core in the preparation mold. Then, the whole is cured at 90°C for 1-2 hours to obtain the prefabricated component. Then, the prefabricated component is taken out from the preparation mold.

5. The preparation method according to claim 4, characterized in that: The preparation mold in step S2 includes: a fixed mold base (7) provided on the support frame (21) and having a forming opening (8) extending through it vertically; a template assembly provided in the forming opening (8); and a groove forming assembly provided on one side of the fixed mold base (7) for forming a positioning groove (6). The template assembly includes an upper mold base (9) and a lower mold base (10) respectively located at both ends of the forming opening (8). The upper mold base (9) and the lower mold base (10) are respectively provided with a protrusion forming groove (11) and a protrusion forming groove (12) for forming a protrusion (3) and a protrusion (4) on opposite outer walls. Multiple sets of hole forming columns (14) for forming through holes (5) are respectively provided in the upper mold base (9) and the lower mold base (10). A horizontal mold base (15) is provided on opposite sides of the upper mold base (9) and the lower mold base (10). The horizontal mold base (15) is connected to a drive assembly on a support frame (21) and is driven by the drive assembly to rise and rotate relative to the fixed mold base (7). A feed pipe (13) is provided through the upper mold base (9) and the upper horizontal mold base (15).

6. The preparation method according to claim 5, characterized in that: The drive assembly includes two sets of linear drive modules (20) respectively disposed on both sides of the support frame (21) and two sets of sliding seats (18) respectively slidably disposed above and below the linear drive modules (20). The two upper sliding seats (18) are connected to the upper horizontal module (15) through a rotating shaft, and the two lower sliding seats (18) are connected to the lower horizontal module (15) through a rotating shaft. The sliding seats (18) are provided with a rotating device (19) for driving the rotating shaft to rotate the horizontal module (15). The linear drive module (20) is used to drive the upper and lower sliding seats (18) to move closer or further apart.

7. The preparation method according to claim 5, characterized in that: The groove forming assembly includes a telescopic device (17) located on one side of the fixed mold base (7). The output end of the telescopic device (17) extends into the forming opening (8) through the movable opening opened in the inner wall of the forming opening (8) and is connected to a positioning block (16) for forming a positioning groove (6). The positioning block (16) is adapted to the movable opening and is located on the horizontal line of the center of the forming opening (8).

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